I really darn not tell her a 'NO' on her face. I could see she loves the new car more than anything else. The current Honda Civic is sexy and attractive, which all ladies like to drive, even though there is no money in their pockets.
Perhaps by showing the above picture, it might help her to change her mind. This is the only 9 seaters MPV available for this family and yet they are happy riding along together. SYF's Hyundai Rio 1600cc saloon car is considered a big car, which she is driving presently and fully paid for.
Specially for this confused SYF - "Life is really simple, but we insist on making it complicated" ~ Confucius